/Engine/Source/Editor/Sequencer/Public/SequencerKeyCollection.h
[TOptional](API\Runtime\Core\IO\TOptional)< [FFrameNumber](API\Runtime\Core\Misc\FFrameNumber) > GetNextSectionKey ( [FFrameNumber](API\Runtime\Core\Misc\FFrameNumber) FrameNumber, EFindKeyDirection Direction ) const